CN219104822U

CN219104822U - Battery busbar quality detection device

Info

Publication number: CN219104822U
Application number: CN202223317124.1U
Authority: CN
Inventors: 张国江; 任朝举
Original assignee: Hubei Eve Power Co Ltd
Current assignee: Hubei Eve Power Co Ltd
Priority date: 2022-12-08
Filing date: 2022-12-08
Publication date: 2023-05-30
Anticipated expiration: 2032-12-08

Abstract

The utility model provides a battery busbar quality detection device, which comprises at least one detection unit, wherein the isolation cover of each detection unit is provided with a containing cavity with an opening at one end, and the opening is arranged to be matched with a welding point of a busbar to enable the containing cavity to form a closed space; the knocking mechanism is arranged in the accommodating cavity and is used for knocking a welding point of the busbar to generate audio; the processing unit is arranged for receiving the real-time audio data fed back by the audio acquisition mechanism, analyzing and processing the real-time audio data and judging the welding quality of the bus; the detection device provided by the utility model adopts an audio comparison analysis mode to detect the welding quality of the battery busbar, and improves the accuracy, stability and reliability of detection.

Description

Battery busbar quality detection device

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery busbar quality detection device.

Background

The power battery manufacturing comprises two important production processes of an electric core and a PACK. When the battery PACK is used, the battery core electrode post and the busbar are welded by laser welding, so that the serial-parallel connection of the single battery core is realized. Various welding defects such as cold joint, burn-through, large cracks and the like may be generated during welding due to the influence of various factors. On one hand, the insufficient battery capacity is brought into play by the cold joint, and the local heating is serious; on the other hand, the dummy solder module generates abnormal voltage difference during charge and discharge, and triggers the protection mechanism of the BMS, so that the battery pack cannot be used normally. Therefore, identification and screening of weld defects is also a significant concern for businesses and customers.

At present, the welding quality of the bus bar of the power battery is mainly detected by visual and CCD visual detection modes. However, visual inspection can only detect visual defects by observing the color of a welding spot, whether the welding spot has burn-through, no penetration, large cracks and other detection modes, but it is difficult to see whether the virtual welding exists, and the visual inspection can only be used for sample inspection and is not applicable to industrialization. However, the CCD visual inspection device is affected by many factors such as industrial cameras, light sources, environment and machine vision software, and if one of the rings is in a problem, the inspection result will be inaccurate.

Disclosure of Invention

The embodiment of the utility model provides a battery busbar quality detection device, which can solve the technical problem that the detection effect is poor in the existing battery busbar quality detection mode.

An embodiment of the present utility model provides a battery busbar quality detection device including:

comprising at least one detection unit, each detection unit comprising:

a shielding cover having a receiving cavity with one end opened, the opening being arranged to cooperate with a welding point of the busbar to form a closed space in the receiving cavity;

the knocking mechanism is arranged in the accommodating cavity and is used for knocking the welding point of the busbar to generate audio; and

the audio acquisition mechanism is arranged in the accommodating cavity and is used for acquiring the audio to generate real-time audio data and feeding back the real-time audio data;

the detection device further comprises a processing unit connected with the detection unit, wherein the processing unit is arranged to receive the real-time audio data fed back by the audio acquisition mechanism and analyze and process the real-time audio data so as to judge the welding quality of the bus.

In one embodiment, the cage includes a top cover and a sidewall that forms the receiving cavity around the top cover;

the knocking mechanism comprises at least one knocking piece, each knocking piece comprises a telescopic part and a knocking part, the telescopic parts are connected to the top cover, the knocking parts are fixedly connected to one ends, far away from the top cover, of the telescopic parts, and the knocking parts are arranged to cooperate with telescopic movement of the telescopic parts to knock welding points of the bus bars so as to generate audio.

In an embodiment, a chamfer is provided at the end of the striking portion remote from the telescopic portion, so that the end of the striking portion is in a smooth convex shape.

In one embodiment, the tapping mechanism includes one of the tapping members slidably or rotatably coupled to the top cover such that the tapping member performs multi-point tapping detection of the welding points of the bus bar.

In one embodiment, the knocking mechanism comprises a plurality of knocking members, and the knocking members are uniformly distributed in the accommodating cavity.

In an embodiment, the audio collection mechanism comprises at least one audio collector fixedly connected to the side wall and located at one end of the side wall away from the top cover.

In an embodiment, the audio collection mechanism includes a plurality of audio collectors, and the plurality of audio collectors are uniformly arranged on the side wall.

In an embodiment, the detection device further comprises a control unit connected to the detection unit, the control unit comprising a movement mechanism and a control mechanism, the control mechanism being arranged to cooperate with the movement mechanism to control the detection unit to move to the welding point of the busbar and to cause the striking mechanism to strike the welding point of the busbar to generate audio.

In one embodiment, the motion mechanism comprises a robotic arm and the control mechanism comprises an electrical control system that controls the motion of the robotic arm.

In an embodiment, the detecting device includes a plurality of detecting units, a plurality of detecting units are fixedly connected with each other, and an arrangement rule of the detecting units is consistent with an arrangement rule of a plurality of welding points on the bus.

The embodiment of the utility model has the beneficial effects that:

in an embodiment of the utility model, a battery busbar quality detection device comprises at least one detection unit, wherein a shielding cover of each detection unit is provided with a containing cavity with one end open, and the opening is arranged to be matched with a welding point of a busbar to enable the containing cavity to form a closed space; the knocking mechanism is arranged in the accommodating cavity and is used for knocking the welding point of the busbar to generate audio; the audio acquisition mechanism is arranged in the accommodating cavity, is used for acquiring the audio to generate real-time audio data and feeding the real-time audio data back to the processing unit, and the processing unit is used for receiving the real-time audio data fed back by the audio acquisition mechanism and analyzing and processing the real-time audio data to judge the welding quality of the bus; the detection device provided by the utility model adopts an audio comparison analysis mode to detect the welding quality of the battery busbar, and improves the accuracy, stability and reliability of detection.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a block diagram of a battery busbar quality detection device system according to an embodiment of the present utility model;

fig. 2 is an isometric view of a battery busbar quality detecting device according to an embodiment of the present utility model;

fig. 3 is a schematic front view of a battery busbar quality detecting device according to an embodiment of the present utility model;

FIG. 4 is a schematic diagram showing a detailed structure of the detecting unit in FIG. 2;

FIG. 5 is an enlarged schematic view of the striking member of FIG. 4;

FIG. 6 is a schematic cross-sectional view of the plexor member of FIG. 5;

FIG. 7 is a schematic diagram of another detailed structure of a detection unit according to an embodiment of the present utility model;

fig. 8 is a schematic diagram of a top view mechanism of the detecting unit in fig. 7.

Reference numerals:

1000. a battery busbar quality detection system; 100. a detection device; 200. a busbar;

10. a detection unit; 20. a processing unit; 30. a control unit; 1. an isolation cover; 2. a knocking mechanism;

3. an audio acquisition mechanism; 4. a movement mechanism; 5. a control mechanism; 11. a top cover; 12. a sidewall;

21. a knocking member; 31. an audio collector; 41. a moving member; 42. a fixing member; 111. an opening;

112. a receiving chamber; 211. a telescopic part; 212. a knocking part; 2111. a first sub-section;

2112. and a second sub-portion.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model. Furthermore, it should be understood that the detailed description is presented herein for purposes of illustration and description only, and is not intended to limit the utility model. In the present utility model, unless otherwise indicated, terms of orientation such as "upper" and "lower" are used to generally refer to the upper and lower positions of the device in actual use or operation, and specifically the orientation of the drawing figures; while "inner" and "outer" are for the outline of the device.

Referring to fig. 1, fig. 1 is a block diagram illustrating a battery busbar quality detection device system according to an embodiment of the present utility model. The battery busbar quality detection device system 1000 includes a detection device 100 and a battery busbar 200, the detection device 100 being configured to detect a welding quality of the battery busbar 200. The battery busbar 200 refers to a busbar 200 welded on a battery cell post in a battery module through a welding process such as laser welding, wherein the busbar 200 enables a plurality of battery cells to be connected in series and parallel, and a welding point is arranged between the busbar 200 and each battery cell post. The detection device 100 detects the welding quality of the welding points of the busbar 200 and the battery core electrode post.

The detection device 100 includes a detection unit 10, a processing unit 20, and a control unit 30, where the control unit 30 is configured to control the detection unit 10 to act to perform audio detection on the welding point of the bus bar 200, and the processing unit 20 is configured to receive the audio data detected by the detection unit 10, and perform analysis processing on the audio data to determine the welding quality of the bus bar 200. Optionally, the control unit 30 includes a tablet computer, a PC, and other terminals. In this embodiment, the welding quality of the battery busbar 200 is detected by adopting the audio comparison analysis method, so that the accuracy, stability and reliability of the detection are improved.

The structure and detection principle of the battery busbar quality detection device 100 will be specifically described below.

Referring to fig. 1 to 6 in combination, fig. 2 is a schematic axial view of a battery busbar quality detection device according to an embodiment of the present utility model, fig. 3 is a schematic front view of a battery busbar quality detection device according to an embodiment of the present utility model, fig. 4 is a schematic detailed structure of a detection unit in fig. 2, fig. 5 is a schematic enlarged view of a knocking member in fig. 4, and fig. 6 is a schematic cross-sectional structure of a knocking member in fig. 5.

Referring to fig. 2 and 3, the detecting device 100 includes at least one detecting unit 10 and a control unit 30. Each detection unit 10 includes a screen 1, a striking mechanism 2, and an audio collection mechanism 3. The shielding cover 1 is used for covering the welding point of the busbar 200 so as to form a closed detection space. The isolation cover 1 has the function of isolating external noise so as to avoid interference of the external noise. The striking mechanism 2 is used to strike the welding point of the busbar 200 to generate audio. The audio collection mechanism 3 is used for collecting the audio generated by the welding point of the bus bar 200 struck by the striking mechanism 2.

In fig. 2 and 3, in order to illustrate the knocking mechanism 2, the knocking mechanism 2 is extended out of the shielding case 1, but the knocking mechanism 2 of the present utility model is not limited thereto, and it is required that the knocking mechanism 2 of the present utility model is operated so that the knocking mechanism 2 can knock the welding point position of the bus bar 200 after the shielding case 1 covers the welding point of the bus bar 200, and the knocking operation of the bridging mechanism does not damage the bus bar 200.

The control unit 30 is connected with the detection unit 10, the control unit 30 comprises a movement mechanism 4 and a control mechanism 5, and the control mechanism 5 is configured to cooperate with the movement mechanism 4 to control the detection unit 10 to move to the welding point of the busbar 200 and enable the knocking mechanism 2 to knock the welding point of the busbar 200 so as to generate audio. Alternatively, the moving mechanism 4 includes a moving member 41 connected to the cage 1 and a fixed member 42 connected to the moving member 41. The moving member 41 and the fixing member 42 serve as a carrying structure of the entire detecting device 100, and the fixing member 42 may be fixed on a plane so that the entire detecting device 100 is kept stable. Wherein a control switch button is provided as the control mechanism 5 on the fixing member 42.

Optionally, the connection mode of the moving mechanism 4 and the isolation cover 1 includes fixed connection, sliding connection or rotating connection, etc. The connection mode of the motion mechanism 4 and the control mechanism 5 comprises fixed connection, sliding connection or rotation connection and the like.

In one embodiment, the motion mechanism 4 may be a mechanical arm, and the control mechanism 5 is an electrical control system for controlling the motion of the mechanical arm. This can greatly improve the detection efficiency of the detection device 100.

Referring to fig. 4, the shielding case 1 includes a top cover 11 and a side wall 12, and the side wall 12 forms a receiving chamber 112 around the top cover 11. The end of the isolation cover 1 opposite to the top cover 11 is provided with an opening 111, and the opening 111 exposes the accommodating cavity 112, so that the isolation cover 1 forms the accommodating cavity 112 with the opening 111 at one end. The opening 111 is configured to cooperate with a welding point of the busbar 200 to form a closed space of the accommodating chamber 112.

Alternatively, the isolation cover 1 is cylindrical, that is, the surface of the top cover 11 is circular, and the side wall 12 forms a hollow cylinder around the top cover 11. Of course, the present utility model is not limited thereto, and the shielding case 1 of the present utility model may have other shapes, and the shape of the shielding case 1 may be adapted to the shape of the welding point of the busbar 200.

The striking mechanism 2 is disposed in the accommodating chamber 112, and the striking mechanism 2 is configured to strike a welding point of the busbar 200 to generate audio. Specifically, the knocking mechanism 2 includes at least one knocking member 21, each knocking member 21 includes a telescopic portion 211 and a knocking portion 212, the telescopic portion 211 is connected to the top cover 11, the knocking portion 212 is fixedly connected to an end of the telescopic portion 211 remote from the top cover 11, and the knocking portion 212 is configured to cooperate with telescopic movement of the telescopic portion 211 to knock a welding point of the busbar 200 so as to generate audio. The present embodiment is described by taking the knocking mechanism 2 including a knocking member 21 as an example.

Optionally, the telescopic portion 211 includes a first sub-portion 2111 and a second sub-portion 2112, the first sub-portion 2111 is connected to the top cover 11, the second sub-portion 2112 is connected to the first sub-portion 2111, and the second sub-portion 2112 can perform telescopic motion in the first sub-portion 2111. The striking part 212 is connected to an end of the second sub-part 2112 remote from the first sub-part 2111, and the striking part 212 moves with the telescopic movement of the second sub-part 2112.

Referring to fig. 5 and 6, the second sub-portion 2112 has a cylindrical shape so as to facilitate the telescopic movement of the second sub-portion 2112 within the first sub-portion 2111. The knocking portion 212 is integrally disposed with the second sub-portion 2112, and an orthographic projection of the knocking portion 212 on the top cover 11 falls on an orthographic projection of the second sub-portion 2112 on the top cover 11, so that a size of the knocking portion 212 is smaller than a size of the second sub-portion 2112.

Alternatively, the striking portion 212 may be cylindrical, elongated, or the like, and the present embodiment is described by taking the striking portion 212 as an elongated shape. The end of the knocking part 212 far away from the second sub-part 2112 is provided with a chamfer, so that the end of the knocking part 212 is in a smooth convex shape, thereby reducing the contact area of the knocking part 212 and the welding point of the busbar 200 and avoiding the knocking part 212 from damaging the busbar 200 when knocking the welding point of the busbar 200.

Optionally, the connection manner of the telescopic portion 211 and the top cover 11 includes a fixed connection, a sliding connection, a rotating connection, or the like. When the telescopic part 211 is fixedly connected with the top cover 11, the knocking member 21 can perform single-point knocking detection on the welding point of the busbar 200. When the telescopic part 211 is slidably or rotatably connected to the top cover 11, the knocking device 21 may perform multi-point knocking detection on the welding point of the busbar 200, so as to improve the accuracy and reliability of the detection device 100. Specifically, after the striking point strikes a first point on the welding point of the busbar 200, the striking member 21 moves to a second point on the welding point of the busbar 200 by sliding or rotating, and strikes the second point.

It should be noted that, each of the detecting units 10 detects one welding point of the bus bar 200 at a time, and one welding point of the bus bar 200 refers to an area, that is, an area where the bus bar 200 is connected to one cell terminal, and the area has a plurality of points, so that one welding point of the bus bar 200 has a plurality of points. And the area of one welding point is larger than the area of the end of the striking part 212, the striking part 212 strikes one point on the welding point of the bus bar 200 at a time.

With continued reference to fig. 4, the audio collection mechanism 3 is disposed within the receiving cavity 112, and the audio collection mechanism 3 is configured to collect the audio to generate real-time audio data and feed back. The audio collection mechanism 3 includes at least one audio collector 31, the audio collector 31 is fixedly connected to the side wall 12, and is located at one end of the side wall 12 away from the top cover 11, that is, the audio collector 31 is disposed on the side wall 12 close to the opening 111, so that the audio collector 31 is close to the knocking portion 212, and the audio generator is further close to the position where the knocking portion 212 knocks the welding portion of the busbar 200 to generate audio, so as to reduce loss of audio transmission, improve authenticity of the audio collected by the audio collector 31, and further improve accuracy of detection of the detection device 100.

Optionally, the audio collection mechanism 3 includes a plurality of audio collectors 31, and the plurality of audio collectors 31 are uniformly arranged on the side wall 12, so as to further improve the authenticity of the audio collected by the audio collectors 31, and further improve the accuracy of detection by the detection device 100. Optionally, the distance between each adjacent two of the audio collectors 31 is equal.

The audio collector 31 collects audio generated by the knocking member 21 knocking the welding point of the bus bar 200 to generate real-time audio data, and feeds back the generated real-time audio data to the processing unit 20. The processing unit 20 is configured to receive the real-time audio data fed back by the audio collection mechanism 3, and perform analysis processing on the real-time audio data to determine the welding quality of the bus bar 200.

Specifically, the processing unit 20 is configured to receive real-time audio data fed back by the audio collector 31, and obtain real-time audio features according to the real-time audio data. The real-time audio characteristics include at least one of frequency, tone, etc. The processing unit 20 is further configured to compare the real-time audio feature with a standard audio feature stored in the processing unit 20 for analysis to determine the welding quality of the busbar 200. The marked audio features are obtained according to the marked audio data, the marked audio features also comprise at least one of frequency, tone and the like, and the feature types in the standard audio features at least comprise the feature types in the real-time audio features, such as the standard audio features comprise frequency and tone, and the real-time audio features comprise frequency and/or tone.

It should be noted that, the standard audio data stored in the processing unit 20 is obtained by performing audio detection on the standard welding point of the bus bar 200 by using the detecting unit 10, where the standard welding point of the bus bar 200 refers to a welding point having no defect, such as a welding point having no defects such as a cold joint, a burn, a large crack, etc. Specifically, the detection unit 10 is further configured to perform audio detection on the marked welding point of the bus 200 to obtain standard audio data, and feed back the standard audio data to the processing unit 20. The processing unit 20 is further configured to receive the standard audio data and obtain the tagged audio feature according to the tagged audio data.

Further, the features in the real-time audio features are compared with the features in the standard audio to determine the welding quality of the busbar 200. For example, the timbre in the real-time audio feature is compared with the timbre of the standard audio feature, and the welding quality of the busbar 200 is judged according to the similarity of the timbre in the real-time audio feature and the timbre of the standard audio feature. Specifically, if the similarity between the tone color in the real-time audio feature and the tone color of the standard audio feature is high, it is determined that the welding point of the bus 200 corresponding to the real-time audio feature is not defective; if the similarity difference between the tone color in the real-time audio feature and the tone color of the standard audio feature is large, it is determined that the welding point of the bus bar 200 corresponding to the real-time audio feature is defective, so as to determine the welding quality of the bus bar 200.

In an embodiment, please refer to fig. 1 to 8 in combination, fig. 7 is a schematic diagram of another detailed structure of the detecting unit provided in the embodiment of the present utility model, and fig. 8 is a schematic diagram of a top view mechanism of the detecting unit in fig. 7. Unlike the above-described embodiments, the striking mechanism 2 includes a plurality of striking members 21, and the plurality of striking members 21 are uniformly arranged in the accommodating chamber 112 to improve the detection efficiency of the detection device 100.

Specifically, referring to fig. 7 and 8, five of the rappers 21 are illustrated in fig. 7 and 8, but the present utility model is not limited thereto, and the rapping mechanism 2 of the present utility model may include more or fewer of the rappers 21. Five of the rappers 21 are uniformly arranged in the accommodating chamber 112 and connected to the top cover 11. When the knocking mechanism 2 knocks the welding point of the busbar 200, the five knocking members 21 can simultaneously knock five points on the welding point of the busbar 200; or the five knocking members 21 sequentially knock five points on the welding point of the busbar 200, for example, a first knocking member 21 knocks a first point on the welding point of the busbar 200, and then a second knocking member 21 knocks a second point on the welding point of the busbar 200 sequentially.

Thus, by providing a plurality of knocking members 21, the welding points of the busbar 200 can be detected in a plurality of points, and the accuracy and reliability of the detection can be improved. Meanwhile, the plurality of knocking members 21 can simultaneously or sequentially perform knocking detection on the welding points of the busbar 200, so that multi-point detection is not required to be realized through sliding or rotation of the knocking members 21, detection time can be saved, and detection efficiency is greatly improved. The other descriptions refer to the above embodiments, and are not repeated here.

In one embodiment, the detecting device 100 includes a plurality of detecting units 10, each detecting unit 10 detects one welding point of the busbar 200 at a time, so that the plurality of detecting units 10 can detect a plurality of welding points on the busbar 200 at the same time, and further the detecting efficiency can be greatly improved. Optionally, the plurality of detecting units 10 are fixedly connected, and the arrangement rule of the plurality of detecting units 10 is consistent with the arrangement rule of the plurality of welding points on the busbar 200, so that each detecting unit 10 corresponds to one welding point on the busbar 200. The other descriptions refer to the above embodiments, and are not repeated here.

As can be seen from the above embodiments:

in the battery busbar quality detection device provided by the embodiment of the utility model, the battery busbar quality detection device comprises at least one detection unit, wherein the isolation cover of each detection unit is provided with a containing cavity with one end open, and the opening is arranged to be matched with the welding point of the busbar to enable the containing cavity to form a closed space; the knocking mechanism is arranged in the accommodating cavity and is used for knocking the welding point of the busbar to generate audio; the audio acquisition mechanism is arranged in the accommodating cavity, is used for acquiring the audio to generate real-time audio data and feeding the real-time audio data back to the processing unit, and the processing unit is used for receiving the real-time audio data fed back by the audio acquisition mechanism and analyzing and processing the real-time audio data to judge the welding quality of the bus; the detection device provided by the utility model adopts an audio comparison analysis mode to detect the welding quality of the battery busbar, and improves the accuracy, stability and reliability of detection.

The foregoing has outlined rather broadly the more detailed description of embodiments of the utility model, wherein the principles and embodiments of the utility model are explained in detail using specific examples, the above examples being provided solely to facilitate the understanding of the method and core concepts of the utility model; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present utility model, the present description should not be construed as limiting the present utility model.

Claims

1. A battery buss bar quality detection apparatus comprising at least one detection unit, each detection unit comprising:

2. The battery busbar quality detection device of claim 1, wherein the cage includes a top cover and a side wall, the side wall forming the receiving cavity around the top cover;

3. The battery busbar quality detection device according to claim 2, wherein a tip of the striking portion remote from the expansion portion is provided with a chamfer so that the tip of the striking portion takes a smoothly convex shape.

4. The battery buss bar quality inspection device of claim 2, wherein the tapping mechanism comprises one of the tapping members slidably or rotatably coupled to the top cover such that the tapping member performs multi-point tapping inspection of the welded points of the buss bar.

5. The battery busbar quality detection device of claim 2, wherein the knocking mechanism comprises a plurality of knocking members, and the knocking members are uniformly arranged in the accommodating cavity.

6. The battery buss bar quality detection apparatus of claim 2, wherein the audio collection mechanism comprises at least one audio collector fixedly connected to the side wall and located at an end of the side wall remote from the top cover.

7. The battery busbar quality detection device of claim 6, wherein the audio collection mechanism comprises a plurality of audio collectors, the plurality of audio collectors being evenly arranged on the side wall.

8. The battery busbar quality detection device of any one of claims 1 to 7, further comprising a control unit connected to the detection unit, the control unit including a movement mechanism and a control mechanism configured to cooperate with the movement mechanism to control movement of the detection unit to the weld of the busbar and to cause the striking mechanism to strike the weld of the busbar to produce audio.

9. The battery busbar quality detection device of claim 8, wherein the movement mechanism includes a robotic arm and the control mechanism includes an electrical control system that controls the motion of the robotic arm.

10. The device for detecting the quality of the battery busbar according to claim 8, wherein the detecting device comprises a plurality of detecting units, the detecting units are fixedly connected, and the arrangement rule of the detecting units is consistent with the arrangement rule of the welding points on the busbar.